简单的excel导入导出示例分享

/// <summary>
        /// 导出excel
        /// </summary>
        /// <param name="stime"></param>
        /// <param name="etime"></param>
        /// <returns></returns>
        public actionresult export(formcollection frm)
        {
            datatable dts = new datatable();
            dts = _shopmemeber.exportmemberdata(frm);
            iworkbook workbook = new xssfworkbook();
            isheet sheet = workbook.createsheet();
            irow headerrow = sheet.createrow(0);
            foreach (datacolumn column in dts.columns)
                headerrow.createcell(column.ordinal).setcellvalue(column.caption);
            int rowindex = 1;
            foreach (datarow row in dts.rows)
            {
                irow datarow = sheet.createrow(rowindex);
                foreach (datacolumn column in dts.columns)
                {
                    datarow.createcell(column.ordinal).setcellvalue(row[column].tostring());
                }
                rowindex++;
            }
            string filepath = server.mappath("/") + @"用户列表.xlsx";
            filestream file = new filestream(filepath, filemode.create);
            workbook.write(file);
            excelhelper.download(@"/用户列表.xlsx");
            #region 不启用

            #endregion
            return successmsg("adminmembermemberindex");
        }
//这个是下载到桌面的方法，没实现自选路径
public static void download(string filename)
 {
             fileinfo fileinfo = new fileinfo(httpcontext.current.server.mappath(filename));
             //以字符流的形式下载文件
             filestream fs = new filestream(httpcontext.current.server.mappath(filename), filemode.open);
            byte[] bytes = new byte[(int)fs.length];
              fs.read(bytes, 0, bytes.length);
            fs.close();
            httpcontext.current.response.contenttype = "application/octet-stream";
               //通知浏览器下载文件而不是打开
            httpcontext.current.response.addheader("content-disposition", "attachment;  filename=" + httputility.urlencode(fileinfo.name, system.text.encoding.utf8));
          httpcontext.current.response.binarywrite(bytes);
           httpcontext.current.response.flush();
            httpcontext.current.response.end();
        }

上面是导出，下面是导入

/// <summary>
        /// 导入数据
        /// </summary>
        /// <param name="file"></param>
        /// <returns>true表示导入成功</returns>
        public bool impoart(httppostedfilebase file)
        {
            try
            {
                //保存excel
                string path = httpcontext.current.server.mappath("/");
                file.saveas(path + file.filename);

                //读取

                filestream sw = file.open(path + file.filename, filemode.open, fileaccess.read);
                iworkbook workbook = new xssfworkbook(sw);
                isheet sheet1 = workbook.getsheet("sheet1");

                //最大行数
                int rowscount = sheet1.physicalnumberofrows;

                //判断首行是否符合规范  也就是excel中的列名
                irow firstrow = sheet1.getrow(0);
                if (
                    !(firstrow.getcell(0).tostring() == "名称" && firstrow.getcell(1).tostring() == "简称" &&
                      firstrow.getcell(2).tostring() == "分类" && firstrow.getcell(3).tostring() == "参考价" &&
                      firstrow.getcell(4).tostring() == "商品介绍"))
                {
                    return false;
                }

                //跳过类型不正确的品项
                for (int i = 1; i < rowscount; i++)
                {
                    irow row = sheet1.getrow(i);
                    shop_product product = new shop_product();

                    string category = row.getcell(2) != null ? row.getcell(2).tostring() : null;
                    if (!string.isnullorempty(category))
                    {
                        var cate =
                            _unitofwork.shop_productcategoryrepository().getall().firstordefault(t => t.name == category);
                        if (cate != null)
                        {
                            product.productcategoryname = cate.name;
                            product.shop_productcategory_id = cate.id;
                        }
                        else
                        {
                            continue;
                        }
                    }
                    else
                    {
                        continue;
                    }

                    product.pname = row.getcell(0) != null ? row.getcell(0).tostring() : null;
                    product.pcname = row.getcell(1) != null ? row.getcell(1).tostring() : null;
                    if (row.getcell(3) != null)
                    {
                        product.price = double.parse(row.getcell(3).tostring());
                    }
                    product.description = row.getcell(4) != null ? row.getcell(4).tostring() : null;

                    _unitofwork.shop_productrepository().insert(product);
                }

                _unitofwork.save();
            }
            catch
            {
                return false;
            }

            return true;
        }